I study animal behaviour, hormones that are linked with social behaviours, and the evolutionary outcomes associated with hormones and with behaviours. In my research, I explore ‘non-traditional’ steroids, such as androgens in females and corticosterone in cortisol-dominant mammals, in the frameworks of behavioural ecology and comparative endocrinology. I am interested in the life history of wild vertebrates in their natural environment, especially in mate choice, reproductive success, parenting and risk-taking behaviours and consequences. I also study the effects of endogenous, social, and anthropogenic stressors on individuals, groups, and populations.